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ELTs, AO wavelengths and science output

Ardeberg, Ame and Linde, Peter LU (2008) Conference on Ground-Based and Airborne Instrumentation for Astronomy II In GROUND-BASED AND AIRBORNE TELESCOPES II, PTS 1-3 7012. p.121-121
Abstract
A study is presented of the impact on science data from extremely large telescopes of a transformation of wavelength base for optimization of actuator architecture from 2 200 to 1250 nm. From the optical path difference (OPD) data for Euro50, we transform to E-ELT OPDs. We compute the corresponding power spectrum, in which we simulate a higher actuator density via high-pass filtering to convert from K to J band actuator-pitch optimization. From the modified power spectrum we derive the correspondingly modified OPDs, PSFs and Strehl ratios. A massive improvement is demonstrated resulting from converting from AO@K to AO@J. This result is followed up by model-based E-ELT imaging in a field in a galactic disc at a distance of 4 Mpc. The... (More)
A study is presented of the impact on science data from extremely large telescopes of a transformation of wavelength base for optimization of actuator architecture from 2 200 to 1250 nm. From the optical path difference (OPD) data for Euro50, we transform to E-ELT OPDs. We compute the corresponding power spectrum, in which we simulate a higher actuator density via high-pass filtering to convert from K to J band actuator-pitch optimization. From the modified power spectrum we derive the correspondingly modified OPDs, PSFs and Strehl ratios. A massive improvement is demonstrated resulting from converting from AO@K to AO@J. This result is followed up by model-based E-ELT imaging in a field in a galactic disc at a distance of 4 Mpc. The improvements in image quality, background and limiting magnitude are very large as are the increases in photometric precision derived from the field imaging. Further, the great science benefit and large opportunities provided by partial AO is demonstrated. In conclusion, while admittedly challenging, pushing AO optimization to wavelengths as short as possible is of prime concern for the science output of ELTs. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Extremely Large Telescopes, optical path differences, power spectrum, point-spread function, wavelength range, photometry, spatial, resolution, imaging, adaptive optics
in
GROUND-BASED AND AIRBORNE TELESCOPES II, PTS 1-3
volume
7012
pages
121 - 121
publisher
SPIE
conference name
Conference on Ground-Based and Airborne Instrumentation for Astronomy II
external identifiers
  • wos:000260430300051
  • scopus:66749092194
ISSN
1996-756X
0277-786X
language
English
LU publication?
yes
id
0dc46b08-4e1d-489e-a41b-d89bd7f8bc26 (old id 1283649)
date added to LUP
2009-02-10 13:55:40
date last changed
2017-11-20 15:06:02
@inproceedings{0dc46b08-4e1d-489e-a41b-d89bd7f8bc26,
  abstract     = {A study is presented of the impact on science data from extremely large telescopes of a transformation of wavelength base for optimization of actuator architecture from 2 200 to 1250 nm. From the optical path difference (OPD) data for Euro50, we transform to E-ELT OPDs. We compute the corresponding power spectrum, in which we simulate a higher actuator density via high-pass filtering to convert from K to J band actuator-pitch optimization. From the modified power spectrum we derive the correspondingly modified OPDs, PSFs and Strehl ratios. A massive improvement is demonstrated resulting from converting from AO@K to AO@J. This result is followed up by model-based E-ELT imaging in a field in a galactic disc at a distance of 4 Mpc. The improvements in image quality, background and limiting magnitude are very large as are the increases in photometric precision derived from the field imaging. Further, the great science benefit and large opportunities provided by partial AO is demonstrated. In conclusion, while admittedly challenging, pushing AO optimization to wavelengths as short as possible is of prime concern for the science output of ELTs.},
  author       = {Ardeberg, Ame and Linde, Peter},
  booktitle    = {GROUND-BASED AND AIRBORNE TELESCOPES II, PTS 1-3},
  issn         = {1996-756X},
  keyword      = {Extremely Large Telescopes,optical path differences,power spectrum,point-spread function,wavelength range,photometry,spatial,resolution,imaging,adaptive optics},
  language     = {eng},
  pages        = {121--121},
  publisher    = {SPIE},
  title        = {ELTs, AO wavelengths and science output},
  volume       = {7012},
  year         = {2008},
}